MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert and operating temperatures ranging from -65 °C to 200 °C. These connectors, with various mounting options like jam nut and box mount receptacles, offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and plated with options like electroless nickel, they ensure durability. With RoHS compliant finishes, these connectors guarantee high performance in demanding applications.